Last Received     (Queues)

DESCRIPTION
The "Last Received" column shows the last time a process took an entry from a 
system queue. A queue is an operating system resource enabling interprocess 
communication.


VALUES
The "Last Received" time has the following format: hh:mm:ss. If a queue has not 
had any activity, "Last Received" displays 'No Entry'. This value is obtained 
directly from the operating system via the msgctl system call.


INTERPRETATION
This statistic can be used to determine if processes are taking messages or 
requests from the queue in a timely manner.  


CONCLUSIONS
Consider a situation where the "Bytes" value reaches "Capacity".  This indicates
that the queue membership has reached its capacity in terms of size.  An obvious
reaction would be to either increase the size of the queue or adjust the number 
of processes that read the queue.  However,  the "Last Received" may reveal that
processes are not taking messages off the queue for some reason. This may be due
to system problems, aborted processes, looping processes, . . . etc.
